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Re: problem with call clobbered regs

From: Jim Wilson <wilson at specifixinc dot com>
To: Daniel Bayer <daniel dot bayer at stud dot uni-rostock dot de>
Cc: gcc at gcc dot gnu dot org
Date: Wed, 11 Feb 2004 19:02:17 -0800
Subject: Re: problem with call clobbered regs
References: <20040211094913.GA12762@nolab.neusy>

Daniel Bayer wrote:

I'm writing a new backend for gcc. At the moment I have a problem with
call clobbered regs. For a certain input it generates this code:

This is most likely a problem with your port. It is difficult to help when no info is available about the port.

You might check to make sure %p3 is mentioned as a call clobbered register.

You can use the -da option to dump rtl after every optimization pass. You can examine the rtl dumps to determine in which optimization pass the problem first occurs. Then you debug that optimization pass to determine what it is doing wrong. -- Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com

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